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Abstract
Breast cancer is the most common cancer, and is the second leading cause of cancer-related mortality in women. Thus, prevention and screening have become important health issues. In general, cancer control is essential for any high prevalence disease, progressive at all its stages, and where timely treatment and earlier detection can alter its natural course. It has been demonstrated that screening and detection in preclinical and premetastatic stages affect treatment decisions and outcome. (Smith, 2004).
Breast masses have a variety of etiologies, benign and malignant. Fibroadenoma is the most common benign breast masses; invasive ductal carcinoma is the most common breast malignancy. (Klein, 2005)
The fibroglandular breast tissue of young women is rich and mammographically dense. Almost 90% of women 30 to 39 years of age have mammographically dense breasts. In general, mammographic sensitivity decreases in dense breast. In screening setting, Ultrasound is more useful to detect breast cancer than mammography in women with dense breast tissue. (Osako et al., 2007)
Ultrasound is a standard modality to diagnose breast diseases. Non palpable breast cancers can be effectively detected by US, and the diagnosis can be confirmed by US-guided FNAC or core biopsy. (Tohno et al., 2005)